The Slate Of Cut Slope Excavation Disturbance Effects And Protection Technology

The research of highway slope has always been a focus at home and abroad, and there are riper methods now,but the high-steep cutting of slate slope, there are studied by less people.The characteristic of high and steep in its project, making more harmfulness that may produce in the course of excavating and constructing.Meanwhile,considering the rainfall has greater influence on slope stability and construction course, the perturbation effect analysis of slate high slope in different excavating stage and different moisture content is an extremely valuable subject.Relying on the project of the high-steep cutting slate slope in the third contract section of Hengyan highway, the influence of excavating stage and moisture content on the stablity of the slate slope,the protection technology of the high-steep cutting slate slope,which were studied in the paper,the main content contains:(1) The laboratory experiments of the complete weathering slate were carried on, obtained physics and mechanics parameter of the entire decency slate, and with the sample of different moisture content and different covered time,carried on the laboratory experiments,obtained the influence of moisture conten and covered time on the mechanics characteristic of complete weathering slate(2) The safety factor of the cutting slate slope in the third contract section of Hengyan highway is calculated, with the limiting equilibrium method and the finite difference method.Through compared the safety factor, the sliding surface shape, the sliding face position which obtained by the two methods,confirmed mutually the confidence level of the two methods.(3) With finite difference method , the exeavating disturbation effect of the slate slope with natural moisture content was analysed,and by comparing the computed result and the scene monitor result, the parameters which obtained in laboratory experiments and the accuracy of the numerical model were confirmed.(4) Combined the physics and mechanics parameter of the slate with different moisture content,which obtained in the laboratory experiments, and by analysed the exeavating disturbation effect of the slate slope with different moisture content, obtained the relation between slope stability and moisture content.(5) In view of the excavating disturation effect and the influence of moisture conten on the slope stability, combining the geology, the terrain, choosed different fence plan,and analysed the effect of the fence by the value simulation.